From b2140e7ea49c4e38341d9ae5d922b6e9c474eabd Mon Sep 17 00:00:00 2001 From: Bhuvanchandra DV Date: Wed, 22 Jun 2016 13:12:43 +0530 Subject: platform: drivers: Add Vybrid UART support Add Vybrid lpuart driver Signed-off-by: Bhuvanchandra DV --- platform/drivers/inc/lpuart_vf6xx.h | 179 ++++++++++++++++++++++++++++++++++++ platform/drivers/src/lpuart_vf6xx.c | 130 ++++++++++++++++++++++++++ 2 files changed, 309 insertions(+) create mode 100644 platform/drivers/inc/lpuart_vf6xx.h create mode 100644 platform/drivers/src/lpuart_vf6xx.c diff --git a/platform/drivers/inc/lpuart_vf6xx.h b/platform/drivers/inc/lpuart_vf6xx.h new file mode 100644 index 0000000..608d239 --- /dev/null +++ b/platform/drivers/inc/lpuart_vf6xx.h @@ -0,0 +1,179 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright (c) 2016, Toradex AG + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __LPUART_VF6XX_H__ +#define __LPUART_VF6XX_H__ + +#include +#include +#include +#include "device_imx.h" + +/******************************************************************************* + * Definitions + ******************************************************************************/ + +/*! @brief UART module initialize structure. */ +typedef struct _uart_init_config +{ + uint32_t clockRate; /*!< Current UART module clock freq. */ + uint32_t baudRate; /*!< Desired UART baud rate. */ + uint32_t wordLength; /*!< Data bits in one frame. */ + uint32_t parity; /*!< Parity error check mode of this module. */ +} uart_init_config_t; + +/*! + * @brief UART number of data bits in a character. + */ +enum _uart_word_length +{ + uartWordLength8Bits = 0x0, + uartWordLength9Bits = UART_UCR1_M, +}; + +/*! + * @brief UART parity mode. + */ +enum _uart_partity_mode +{ + uartParityDisable = 0x0, + uartParityEven = UART_UCR1_PE, + uartParityOdd = UART_UCR1_PE | UART_UCR1_PT +}; + +/******************************************************************************* + * API + ******************************************************************************/ + +#if defined(__cplusplus) +extern "C" { +#endif + +/*! + * @name UART Initialization and Configuration functions + * @{ + */ + +/*! + * @brief Initialize UART module with given initialize structure. + * + * @param base UART base pointer. + * @param initConfig UART initialize structure(see uart_init_config_t above). + */ +void LPUART_Init(UART_Type* base, uart_init_config_t* initConfig); + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetParity + * Description : This function configures uart module parity mode. + * + *END**************************************************************************/ +static inline void LPUART_SetParity(UART_Type* base, uint32_t parityMode) +{ + UART_C1_REG(base) = parityMode; +} + +/*! + * @brief This function is used to set the baud rate of UART Module. + * + * @param base UART base pointer. + * @param clockRate UART module clock frequency. + * @param baudRate Desired UART module baud rate. + */ +void LPUART_SetBaudRate(UART_Type* base, uint32_t clockRate, uint32_t baudRate); + +/*! + * @brief This function is used to send data. + * + * @param base UART base pointer. + * @param data Data to be set through Uart module. + */ +static inline void LPUART_PutChar(UART_Type* base, uint8_t data) +{ + UART_D_REG(base) = data; +} + +/*! + * @brief This function is used to receive data. + * + * @param base UART base pointer. + * @return The data received from UART module. + */ +static inline uint8_t LPUART_GetChar(UART_Type* base) +{ + return UART_D_REG(base); +} + +static inline void LPUART_Enable(UART_Type* base) +{ + UART_C2_REG(base) |= (UART_UCR2_TE | UART_UCR2_RE); +} + +static inline void LPUART_Disable(UART_Type* base) +{ + UART_C2_REG(base) &= ~(UART_UCR2_TE | UART_UCR2_RE); +} + +static inline void LPUART_WaitRecvReady(UART_Type* base) +{ + /* Wait until the data is ready to be received. */ + while ((UART_S1_REG(base) & UART_S1_RDRF) == 0); +} + +static inline uint8_t LPUART_RecvBlocking(UART_Type* base) +{ + LPUART_WaitRecvReady(base); + + return LPUART_GetChar(base); +} + +static inline void LPUART_WaitSendReady(UART_Type* base) +{ + /* Wait until the data has been transferred into the shift register. */ + while ((UART_S1_REG(base) & UART_S1_TC) == 0); +} + +static inline void LPUART_SendBlocking(UART_Type* base, uint8_t data) +{ + LPUART_WaitSendReady(base); + LPUART_PutChar(base, data); +} + +#ifdef __cplusplus +} +#endif + +/*! @}*/ + +#endif /* __LPUART_VF6XX_H__ */ +/******************************************************************************* + * EOF + ******************************************************************************/ diff --git a/platform/drivers/src/lpuart_vf6xx.c b/platform/drivers/src/lpuart_vf6xx.c new file mode 100644 index 0000000..e28d198 --- /dev/null +++ b/platform/drivers/src/lpuart_vf6xx.c @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright (c) 2016, Toradex AG + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include + +/******************************************************************************* + * Code + ******************************************************************************/ + +/******************************************************************************* + * Initialization and Configuration functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_Init + * Description : This function initializes the module according to uart + * initialize structure. + * + *END**************************************************************************/ +void LPUART_Init(UART_Type* base, uart_init_config_t* initConfig) +{ + assert(initConfig); + + LPUART_Disable(base); + LPUART_SetParity(base, initConfig->parity); + LPUART_SetBaudRate(base, initConfig->clockRate, initConfig->baudRate); +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetBaudRate + * Description : This function configures uart module baud rate. + * + *END**************************************************************************/ +void LPUART_SetBaudRate(UART_Type* base, uint32_t clockRate, uint32_t baudRate) +{ + uint32_t sbr, brfa; + uint8_t cr4 = 0, bdh = 0; + + sbr = clockRate / (16 * baudRate); + brfa = ((clockRate - (16 * sbr * baudRate)) * 2) / baudRate; + bdh &= ~UART_BDH_SBR_MASK; + bdh |= (sbr >> 8) & UART_BDH_SBR_MASK; + cr4 &= ~UART_C4_BRFA_MASK; + brfa &= UART_C4_BRFA_MASK; + + UART_C4_REG(base) = (cr4 | brfa); + UART_BDH_REG(base) = bdh; + UART_BDL_REG(base) = sbr; +} + +/******************************************************************************* + * Hardware Flow control and Modem Signal functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetRtsFlowCtrl + * Description : This function is used to set the enable condition of RTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetRtsFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_RTS; + else + UART_MODEM_REG(base) |= UART_FLOWCONTROL_RTS; +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetCtsFlowCtrl + * Description : This function is used to set the enable condition of CTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetCtsFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) |= UART_FLOWCONTROL_CTS; + else + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_CTS; +} + +/*FUNCTION********************************************************************** + * + * Function Name : LPUART_SetFlowCtrl + * Description : This function is used to set the enable condition of RTS, CTS + * auto control. + * + *END**************************************************************************/ +void LPUART_SetFlowCtrl(UART_Type* base, bool enable) +{ + if (enable) + UART_MODEM_REG(base) |= UART_FLOWCONTROL_MASK; + else + UART_MODEM_REG(base) &= ~UART_FLOWCONTROL_MASK; +} + +/******************************************************************************* + * EOF + ******************************************************************************/ -- cgit v1.2.3